En kort sitat om Vredens Druer:
Throughout I've tried to make the reader participate in the actuality, what he takes from it will be scaled entirely on his own depth or hollowness. There are five layers in this book; a reader will find as many as he can and he won't find more than he has in himself. (1/16/39)
(He, his og himself kunne kanskje vært bytta med she, her og herself hvis Carol Steinbeck hadde maskinskrevet brevet for han)